"Franz Heymann" wrote
Since each tree requires one planter, the ratio of the price of the
planters
to that of the trees is independent of the planting density. Having
said
that, you are probably right insofar as the cost of the container
might well
exceed that of the tree. But that is a problem common to all shrubs
or
trees grown in "respectable" containers.
Franz

True, but I discovered the 'second hand' pile of pots at my local
garden centre :~))
They supply garden etc and have loads of HUGE pots going for less than
1/4 of the new price. Ok they are not pretty glazed pots, but those
black rubber/plastic ones. I disguise them on my patio and roofgarden
with smaller prettier ones.
I picked up a massive one for my Rhus which has outgrown it's space.

Jenny